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Posted to dev@hive.apache.org by "Zoltan Haindrich (JIRA)" <ji...@apache.org> on 2017/11/07 21:17:00 UTC

[jira] [Created] (HIVE-18005) Improve size estimation for array() to be not 0

Zoltan Haindrich created HIVE-18005:
---------------------------------------

             Summary: Improve size estimation for array() to be not 0
                 Key: HIVE-18005
                 URL: https://issues.apache.org/jira/browse/HIVE-18005
             Project: Hive
          Issue Type: Bug
          Components: Statistics
            Reporter: Zoltan Haindrich


happens only in case the array is not from a column; and the array contains no column references

{code}
EXPLAIN
SELECT sort_array(array("b", "d", "c", "a")),array("1","2") FROM t

...
             Statistics: Num rows: 1 Data size: 0 Basic stats: COMPLETE Column stats: COMPLETE
             ListSink
{code}






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